Average age of successful entrepreneurs: 45, not 25.
The average age of successful entrepreneurs, measured by the fastest-growing new firms in the United States, is 45. That figure comes from Census business records matched to tax records, so it counts every founder, not only the famous ones.
Where the young-founder picture comes from.
Bill Gates was nineteen. Steve Jobs was twenty-one. Every one of those ages is true, so the picture feels like evidence. However, it starts from the winners and works backwards. Nobody names the nineteen-year-olds who failed, although there were a great many.
Studies of venture-backed unicorns add to the confusion. For example, one study of thirty-five unicorns found a mean founding age of thirty-one. But that sample only contains people who raised money. Therefore it measures who investors fund, not who succeeds.
The average age of successful entrepreneurs in the full data.
In 2018, Pierre Azoulay, Benjamin Jones, J. Daniel Kim and Javier Miranda matched US business filings to tax records. For the first time, every company could be linked to the age of its founder. Among the fastest-growing one in a thousand firms, the mean founder age was forty-five. Even inside computing, it was around thirty-nine or forty.
Other research disagrees in part. A 2025 study found that performance rises with age and then falls. However, it measured survival rather than explosive growth, which is a different question.
The finding that matters more.
Industry experience predicted much greater success. Not education, and not general business experience, but knowing that particular trade.
Count your years in one trade.
Write down how many years you have spent close to the real work of one industry.
Then cross out the years you spent one floor above it, describing the work instead of doing it.
From the book.
The finding is this. Across the new ventures sitting in that data, the mean age of the founders of the fastest-growing one in a thousand of them turned out to be forty-five.
I Want to Start a Business but I Can't Quit My Job, chapter 2: The forty-five-year-old founder
Questions about average age of successful entrepreneurs.
What is the average age of successful entrepreneurs?
For the fastest-growing new US firms, the mean founder age was 45, according to Azoulay, Jones, Kim and Miranda (2018).
Is it too late to start a business at 40?
No. The data shows the most successful founders were typically in their forties, largely because of years of experience in one industry.
Should I wait until I am older to start?
No. The study compared different people, so it never showed that waiting improves anyone. The advantage comes from what you do during those years.
Read the whole chapter.
This lesson covers one section of chapter 2, “The forty-five-year-old founder”. The book goes further, with the full evidence, the stories and every exercise.
